static gboolean
gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstV4l2Src *v4l2src;
GstV4l2Object *obj;
v4l2src = GST_V4L2SRC (src);
obj = v4l2src->v4l2object;
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
/* make sure we stop capturing and dealloc buffers */
if (!gst_v4l2_object_stop (obj))
return FALSE;
g_signal_emit (v4l2src, gst_v4l2_signals[SIGNAL_PRE_SET_FORMAT], 0,
v4l2src->v4l2object->video_fd, caps);
if (!gst_v4l2_object_set_format (obj, caps))
/* error already posted */
return FALSE;
return TRUE;
}
static gboolean
gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstV4l2Src *v4l2src;
GstV4l2Object *obj;
v4l2src = GST_V4L2SRC (src);
obj = v4l2src->v4l2object;
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
if (GST_V4L2_IS_ACTIVE (obj)) {
/* Just check if the format is acceptable, once we know
* no buffers should be outstanding we try S_FMT.
*
* Basesrc will do an allocation query that
* should indirectly reclaim buffers, after that we can
* set the format and then configure our pool */
if (gst_v4l2_object_try_format (obj, caps)) {
v4l2src->renegotiation_adjust = v4l2src->offset + 1;
v4l2src->pending_set_fmt = TRUE;
} else
return FALSE;
} else {
/* make sure we stop capturing and dealloc buffers */
if (!gst_v4l2_object_stop (obj))
return FALSE;
return gst_v4l2src_set_format (v4l2src, caps);
}
return TRUE;
}
static gboolean
gst_v4l2_video_dec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
gboolean ret = TRUE;
GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
if (self->input_state) {
if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
GST_DEBUG_OBJECT (self, "Compatible caps");
goto done;
}
gst_video_codec_state_unref (self->input_state);
self->input_state = NULL;
/* FIXME we probably need to do more work if pools are active */
}
ret = gst_v4l2_object_set_format (self->v4l2output, state->caps);
if (ret)
self->input_state = gst_video_codec_state_ref (state);
done:
return ret;
}
static gboolean
gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
GstV4l2Object *obj = v4l2sink->v4l2object;
LOG_CAPS (v4l2sink, caps);
if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
GST_DEBUG_OBJECT (v4l2sink, "device is not open");
return FALSE;
}
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
if (!gst_v4l2_object_stop (obj))
goto stop_failed;
if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, caps))
goto invalid_format;
gst_v4l2sink_sync_overlay_fields (v4l2sink);
gst_v4l2sink_sync_crop_fields (v4l2sink);
#ifdef HAVE_XVIDEO
gst_v4l2_video_overlay_prepare_window_handle (v4l2sink->v4l2object, TRUE);
#endif
GST_INFO_OBJECT (v4l2sink, "outputting buffers via mmap()");
v4l2sink->video_width = GST_V4L2_WIDTH (v4l2sink->v4l2object);
v4l2sink->video_height = GST_V4L2_HEIGHT (v4l2sink->v4l2object);
/* TODO: videosink width/height should be scaled according to
* pixel-aspect-ratio
*/
GST_VIDEO_SINK_WIDTH (v4l2sink) = v4l2sink->video_width;
GST_VIDEO_SINK_HEIGHT (v4l2sink) = v4l2sink->video_height;
return TRUE;
/* ERRORS */
stop_failed:
{
GST_DEBUG_OBJECT (v4l2sink, "failed to stop streaming");
return FALSE;
}
invalid_format:
{
/* error already posted */
GST_DEBUG_OBJECT (v4l2sink, "can't set format");
return FALSE;
}
}
